Birefringent plate arrangement with stress birefringence
Patent 6141148 Issued on October 31, 2000. Estimated Expiration Date: 
March 8, 2019. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
March 8, 2019. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3600611 3867014 Liquid crystal display device having negative uniaxial anisotropic film with inclined optical axis and protective films Stepped lens with Fresnel surface structure produced by lithography and process for manufacturing of same Optical filter Ophthalmic lens Patent #: 5625427 InventorAssigneeApplicationNo. 265524 filed on 03/08/1999US Classes:359/500, With particular material or mounting structure359/352, Having polarizing element359/494, By birefringent element385/11POLARIZATION WITHOUT MODULATIONExaminersPrimary: Spyrou, CassandraAssistant: Winstedt, Jennifer Foreign Patent References
International ClassesG02B 027/28G02B 005/30 G02B 006/00 Foreign Application Priority Data1998-03-10 DEAbstractA birefringent plate arrangement with stress birefringence has pressure or shear shoe devices that engage on the sides of a birefringent plate. A plate with rectangular steps is provided for the round cross section of a pencil of light rays. The arrangement includes hydraulic transmission produced by weight force, and thermosymmetric construction. | |
